Description
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in WP Mailster WP Mailster wp-mailster allows Stored XSS.This issue affects WP Mailster: from n/a through 1.9.1.0.
Published: 2026-10-22
Score: 7.1 High
EPSS: < 1% Very Low
KEV: No
Impact: Stored cross‑site scripting (XSS)
Action: Immediate Patch
AI Analysis

Impact

Stored XSS in the WP Mailster WordPress plugin allows an attacker to inject malicious scripts that are persisted in the application’s output. This vulnerability can lead to arbitrary script execution when users view pages that render plugin data.

Affected Systems

The vulnerability affects the WordPress WP Mailster plugin, versions up to and including 1.9.1.0. Any WordPress installation utilizing this plugin is susceptible unless updated to a patched release.

Risk and Exploitability

The vulnerability carries a CVSS score of 7.1, indicating high severity. No EPSS score is provided, and the issue is not listed in the CISA KEV catalog. The likely attack vector involves submitting malicious content through the plugin’s administration interface, which is then rendered without proper neutralization. Based on the description, it is inferred that the injected scripts would execute in the context of users who view the affected pages.

Generated by OpenCVE AI on October 22, 2026 at 10:07 UTC.

Remediation

Vendor Solution

Update the WordPress WP Mailster plugin to the latest available version (at least 1.9.2.0).

OpenCVE Recommended Actions

  • Update the WP Mailster plugin to version 1.9.2.0 or later.
  • If an immediate update is not possible, disable the plugin until a patched version is available.
  • Restrict the ability to add content through the plugin to trusted administrator accounts and review input sanitation practices.

Generated by OpenCVE AI on October 22, 2026 at 10:07 UTC.

Tracking

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Advisories

No advisories yet.

History

Thu, 22 Oct 2026 11:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Thu, 22 Oct 2026 10:30:00 +0000

Type Values Removed Values Added
First Time appeared Wordpress-extensions
Wordpress-extensions wp Mailster
Wpmailster
Wpmailster wp Mailster
Vendors & Products Wordpress-extensions
Wordpress-extensions wp Mailster
Wpmailster
Wpmailster wp Mailster

Thu, 22 Oct 2026 08:30:00 +0000

Type Values Removed Values Added
Description Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in WP Mailster WP Mailster wp-mailster allows Stored XSS.This issue affects WP Mailster: from n/a through 1.9.1.0.
Title WordPress WP Mailster plugin <= 1.9.1.0 - Cross Site Scripting (XSS) vulnerability
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 7.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L'}

Subscriptions

Wordpress-extensions Wp Mailster
Wpmailster Wp Mailster
cve-icon MITRE

Status: PUBLISHED

Assigner: Patchstack

Published:

Updated: 2026-10-22T10:56:14.523Z

Reserved: 2026-10-17T00:17:57.460Z

Link: CVE-2026-111830

cve-icon Vulnrichment

Updated: 2026-10-22T10:51:54.772Z

cve-icon NVD

Status : Deferred

Published: 2026-10-22T09:17:13.597

Modified: 2026-10-22T15:15:23.833

Link: CVE-2026-111830

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-22T10:15:03Z

Weaknesses
  • CWE-79

    Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')